4(3-5x-4x)+5(7x+4)=21

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Solution for 4(3-5x-4x)+5(7x+4)=21 equation:


Simplifying
4(3 + -5x + -4x) + 5(7x + 4) = 21

Combine like terms: -5x + -4x = -9x
4(3 + -9x) + 5(7x + 4) = 21
(3 * 4 + -9x * 4) + 5(7x + 4) = 21
(12 + -36x) + 5(7x + 4) = 21

Reorder the terms:
12 + -36x + 5(4 + 7x) = 21
12 + -36x + (4 * 5 + 7x * 5) = 21
12 + -36x + (20 + 35x) = 21

Reorder the terms:
12 + 20 + -36x + 35x = 21

Combine like terms: 12 + 20 = 32
32 + -36x + 35x = 21

Combine like terms: -36x + 35x = -1x
32 + -1x = 21

Solving
32 + -1x = 21

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-32' to each side of the equation.
32 + -32 + -1x = 21 + -32

Combine like terms: 32 + -32 = 0
0 + -1x = 21 + -32
-1x = 21 + -32

Combine like terms: 21 + -32 = -11
-1x = -11

Divide each side by '-1'.
x = 11

Simplifying
x = 11

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